C/2019 U5 PanSTARRS
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Comet C/2019 U5 was discovered on 22 October 2019, about 3.5 yr before its perihelion passage (10.38 au from the Sun). Later two pre-discovery observations were found from 11 October 2019 (heliocentric disctance: 10.45 au). In the moment of orbit determination, this comet was still observed.
Currently, solutions (GR and NG) based on pre-perihelion data are given. Therefore, the data arc span over 3.46 yr in a range of heliocentric distances from 10.45 au to 3.62 au.
This is Oort spike comet.
Currently, solutions (GR and NG) based on pre-perihelion data are given. Therefore, the data arc span over 3.46 yr in a range of heliocentric distances from 10.45 au to 3.62 au.
This is Oort spike comet.
| solution description | ||
|---|---|---|
| number of observations | 3637 | |
| data interval | 2019 10 11 – 2023 03 29 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 10.45 au – 3.62 au (perihelion) – 3.62 au | |
| type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| data weighting | YES | |
| number of residuals | 7177 | |
| RMS [arcseconds] | 0.28 | |
| orbit quality class | 1a+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2023 02 25 | |
| perihelion date | 2023 03 29.85192718 | ± 0.00030490 |
| perihelion distance [au] | 3.62418014 | ± 0.00000137 |
| eccentricity | 1.00140908 | ± 0.00000160 |
| argument of perihelion [°] | 181.497211 | ± 0.000063 |
| ascending node [°] | 2.637387 | ± 0.000003 |
| inclination [°] | 113.520555 | ± 0.000007 |
| reciprocal semi-major axis [10-6 au-1] | -388.80 | ± 0.44 |
Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line — the moment of perihelion passage.
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | 1.747 | ± 0.035 |
| A2 [10-8au/day2] | -1.2508 | ± 0.038 |
| A3 [10-8au/day2] | 0.066763 | ± 0.009708 |
| m | -2.00 | |
| n | 3.000 | |
| k | -2.6000 | |
| r0 [au] | 10.000 | |
| α | 0.0100 | |